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Old 06-13-2014, 08:00 AM   #16
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GEC Touching Metal Building


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Originally Posted by DBoone View Post
Yep it has it's own service and meter.

There will be a little current on the GEC going to the ground rod and to the utility pole so I was thinking maybe current would be all over the metal siding, through the slab, back to utility pole. Didn't want to have any problems.

But you're right. The meter is mounted to the metal siding already so I can't see there being any extra issues with the GEC touching the metal siding.
There should be NO current on the GEC if the system is functioning properly.

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Old 06-13-2014, 08:22 AM   #17
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GEC Touching Metal Building


Yes there will be some current on it. Maybe not much but a little. It provides a path to complete the circuit no?
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Old 06-13-2014, 08:28 AM   #18
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GEC Touching Metal Building


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There should be NO current on the GEC if the system is functioning properly.
There could be small amounts of current on a properly functioning system. The GEC is in a parallel path with the grounded conductor.
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Old 06-13-2014, 08:33 AM   #19
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GEC Touching Metal Building


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It provides a path to complete the circuit no?
It's not supposed to complete a circuit but by design it can't help not to take a little bit of the current.
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Old 06-13-2014, 09:09 AM   #20
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GEC Touching Metal Building


The resistance of the earth is typically too high.
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Old 06-13-2014, 09:35 AM   #21
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GEC Touching Metal Building


Well good deal. Sounds like everything will be okay.
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Old 06-13-2014, 10:11 AM   #22
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GEC Touching Metal Building


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Well... Isn't the UFER grounding (rebar in foundation) a grounding component of the GEC and not done as an issue of becoming energized as in the bonding (equalpotential) function of the GEC.... if that made sense.

I guess I'm saying the run to the rebar (UFER) is to establish a ground, and any bonding to the steel sideing would be to establish equal potential if the siding became energized.... sorta two differnt functions/objectives.

But, a pretty good point.... seems if we bond pipes and Jacussi motors to make sure they are at ground potential, does seem we outta ground steel siding which seems it could get energised also.

Not that I wanna go there.... just discussion
I have more faith in ground or 2 than I do in rebar thats encases if concrete if something big were to hit, of course im not a fancy engineer with a bunch of letters before my name.
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Old 06-13-2014, 04:03 PM   #23
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I have more faith in ground or 2 than I do in rebar thats encases if concrete if something big were to hit, of course im not a fancy engineer with a bunch of letters before my name.
Why not google Herbert G. Ufer if you are not convinced?
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Old 06-13-2014, 04:04 PM   #24
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I have more faith in ground or 2 than I do in rebar thats encases if concrete if something big were to hit.
Want to share why you feel that way?
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Old 06-13-2014, 07:25 PM   #25
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If the rebar works so much better than a ground rod why cant you just dig a trench 2' deep 10' long and just toss the ground rod in there?
Im sure theres probably some highly complicated reason to explain why the rebar works, but weve used ground rods and water service ground connections since before my time without an issue.
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Old 06-13-2014, 08:17 PM   #26
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If the rebar works so much better than a ground rod why cant you just dig a trench 2' deep 10' long and just toss the ground rod in there?
Im sure theres probably some highly complicated reason to explain why the rebar works, but weve used ground rods and water service ground connections since before my time without an issue.
Do your research grasshopper... And who said anything without an issue? Sure, ground rods are an expectable method, but not the best method...

In 1942, Herbert G. Ufer was a consultant working for the U.S. Army. Ufer was given the task of finding a lower cost and more practical alternative to traditional copper rod grounds for these dry locations. Ufer discovered that concrete had better conductivity than most types of soil.

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Old 06-13-2014, 10:05 PM   #27
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Yes there will be some current on it. Maybe not much but a little. It provides a path to complete the circuit no?
No ... it doesn't
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Old 06-13-2014, 10:11 PM   #28
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So where were you in 1942 When this was discovered? that was just slightly before my time anyway.
If concrete is so much better of a conductor why have we still been pounding ground rods and bonding water lines?
Its like anything else theres always going to be a new improved way of doing anything.
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Old 06-13-2014, 10:51 PM   #29
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No ... it doesn't
It may/might .... depends on voltage and resistivity
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Old 06-13-2014, 11:00 PM   #30
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GEC Touching Metal Building


The resistance of the neutral will be many times lower than earth. The high resistance of earth is why the GEC never needs to be larger than #6.

The concrete in the footer stays moister than the earth around a ground rod and also has many times the contact area compared to a rod.

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